How to DISABLE ipv6 in CentOS5 System

echo “NETWORKING_IPV6=no” >> /etc/sysconfig/network
echo “alias ipv6 off” >> /etc/modprobe.conf
echo “alias net-pf-10 off” >> /etc/modprobe.conf
reboot
# ifconfig
eth1      Link encap:Ethernet  HWaddr 00:1C:F0:BB:A7:28
inet addr:10.10.10.11  Bcast:10.10.10.255  Mask:255.255.255.0
inet6 addr: fe80::21c:f0ff:febb:a728/64 Scope:Link
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:470449435 errors:1 dropped:0 overruns:0 frame:0
TX packets:464084402 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2563674692 (2.3 GiB)  TX bytes:2243518951 (2.0 GiB)
Interrupt:225 Base address:0×2800
Don’t really [...]

Posted on July 19th, 2010 by Denie
Filed under: BASH, CentOS, Networking, Tutorials, tips | No Comments »

How to recover domain when the primary domain controller failes and there are member domain controllers

Many of us have probably dabbled in setting up our own domain and forest for development purposes. For me – a domain is a must – I have my development environment that is heavily used to model development projects for clents – and I have my family – me, my wife, and 7 children with [...]

Posted on August 13th, 2008 by Denie
Filed under: Networking, Windows | No Comments »

VPN Ports

PPTP uses IP protocol 47, designed for “General Routing Encapsulation” or GRE packets. A common mistake in configuring firewalls for use with PPTP is to open PPTP port 1723 (allowing connections to be established) but forget to forward GRE protocol type 47 (denying port data from passing through the tunnel). Some operating systems include “PPTP [...]

Posted on August 13th, 2008 by Denie
Filed under: Networking | No Comments »